[danieltillett]

I hope you understand that an iceberg floating in water displaces the same volume as ice as water [1].

1. I am ignoring the complexity of freshwater and saltwater mixing.

[natch]

The relevant part of the article was talking about ice that is sitting on land. Land that is below sea level. This particular ice is not floating.

[sp332]

But ice pushed down under the water will increase the water level. If you melt it, the water level will be lower.